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(1)在培育转人生长激素基因牛的过程中,①过程需要的工具酶是 ,
②过程常用的方法是________。③过程培养到 阶段,可以采用________技术,培育出多头相同的转基因犊牛。
(2)在抗虫棉培育过程中,④过程中的受体细胞采用愈伤组织细胞与采用叶肉细胞相比较, 其优点是________________,⑤过程采用的技术是 ,该技术中,愈伤组织细胞可通过在液体培养基中形成单个胚性细胞,利用胚性细胞再分化形成的_____________可制成人工种子或发育成植株。但连续传代培养后,胚性细胞全性可能降低,从细胞内部看,主要原因是传代过程中发生_____________ 等变化。 查看习题详情和答案>>
Do you know what special birthday presents the German Chancellor Schroeder(德国总理施罗德)gave his mother?
In 1990, he took her to lunch in a Mercedes(奔驰)car for her 80th birthday.
Schroeder’s family was very poor when he was young. Once his grandma had to steal(偷)meat from their neighbors. That was the only way to give the family a good supper. His mother was very sad and cried about it. Young Schroeder held his mother in his arms and said, “Mom, one day I’ll take you out in a Mercedes.” Forty years later he made these words come true.
Schroeder gave the old lady a second special present ten years later.
His father died before he was born. He was killed in World War II. His family didn’t know where his grave(坟墓)was. So Schroeder gave his mother a map on her 90th birthday. This map was very special. It showed where his father’s grave was. The old lady smiled happily at the surprising gift. Then Chancellor held his mother in his arms and kissed her face.
【小题1】Where did Schroeder take his mother to lunch for her 80th birthday?
A.In a big restaurant. | B.In his office. |
C.In a Mercedes car. | D.At home. |
A.In 1990. | B.In 1950. | C.In 2000. | D.In 1948. |
A.A Mercedes car. | B.A grave. |
C.A very special map. | D.A big cake. |
A.The war. | B.His grandfather. |
C.A driver in a Mercedes. | D.An earthquake. |
A.Schroeder’s family was rich when he was young. |
B.Schroeder’s grandma liked stealing things very much. |
C.Schroeder was very young when his father died. |
D.Schroeder has a strong love for his mom. |
Steve Jobs was one of the fathers of the personal computing time and the founder of Apple. He was also one of the giants of the information age. Here are some of his greatest contributions.
Apple II
Jobs and Steve Wozniak
founded Apple Computers Inc.
in 1976. A year later,
the Apple II was invented.
This production was the world’s
first mass-market personal computer.
The iMac
Under Job’s leadership,
Apple introduced the
all-in-line iMac computer
in 1998. the iMac became
the first machine, which offered
only a CD-ROM slot.
The iPad
By 2010, Steve Jobs was
confident. The world was
ready to have a tablet
computer that would be great
for watching movies and
playing games.
The touch-sensitive iPad is a great success.
iPhone 4s
iPhone 4s came out on
October 4, 2011, in America.
It looks like iPhone 4.
It has a larger and wider
screen and a slimmer yet
wider case. It has a better camera
and faster data transfer speeds.
1.The Apple II was invented ________.
A. In 1976. B. In 1997. C. In 1998. D. In 2010.
2.From the passage, we can know that the iPad ________.
A. has a better camera B. is the first personal computer
C. has a CD-ROM slot D. is great for watching movies
3.According to the passage, which of the following is True?
A. IPhone 4s’ screen is the same size as iPhone 4.
B. IPhone 4s has a larger and slimmer case than iPhone 4.
C. IPhone 4s uses less time to transfer data than iPhone 4.
D. IPhone 4s with an improved camera is cheaper than iPhone 4.
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按所给的汉语,用英语完成下列句子,并将答案写在答题卡标有题号的横线上。
1.你拒绝接受老师的建议是愚蠢的。
It ________________________________ the teachers’ advice.
2.那个小男孩宁愿把焦虑藏在心底也不愿和别人分享。
The little boy would rather ________________________________ others.
3.雪下得太大了,我们没能去听音乐会。
The snow was ________________________________ going to the concert.
4.上周警方全力以赴在破这起凶杀案。
All of their ________________________________ the murder by the police last week.
5.这两部数码相机似乎有些区别。
________________________________ the two digital cameras.
6.我想知道会议是否开始近10分钟了。
I wondered ________________________________ for almost ten minutes or not.
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